Lingual bar



MLF. ARATA.

LINGUAL BAR.

APPLICATION FILED ocr.12, 1921.

Patented Nov. 211, N22,

PLl-7 7E5 OR PART/ 9L DENT/711E615 ATTORNEY Patented Nov. Ell,

( ap -1 a. new t3 ii A. an hi IIIARIO F. ARATA, OF SAN ANSELJHO,CALIFORNIA.

LING-HAL BAR.

Application filed October 12, 1921.

T 0 all whom it may concern:

Be it known that I, l lanio Amara, a citizen of the United States,residing at San Anselmo, in the county of Marin and State of California,have invented new and useful Improvements in Lingual of which thefollowing is a specification.

This invention relates to a lingual bar, and especially to such bars asare used in partial dentures.

The object of the present invention is to generally improve and simplifybars of the character described; to provide a bar which may be employedin any shape mouth, whether the gums are low ridged, high ridged, orformed with deep lingual walls; a bar which will minimize space and maybe bent to meet varying conditions without fear of fracture, and aboveall a bar which will give a maximum of anchorage, reinforcement andretention.

Further objects will hereinafter appear.

The invention consists of the parts and the construction, combinationand arrangement of parts as hereinafter more fully described andclaimed, having reference to the accompanying drawings in which- Fig. 1is a perspective view of the lingual bar. Fig. 2 is a plan view showingthe position of the lingual bar with relation to the partial denturesand the permanent teeth.

Fig'. 3 is a cross section of a partial denture illustrating a flat orlow ridged mouth.

Fig. i is a similar section illustrating high ridged mouth.

Fig. 5 is a cross section. illustrating a mouth with deep lingual walls.

Referring to the drawings in detail, and particularly to Figs. 1 and 2,A indicates the lingual bar forming the subject matter of the presentinvention. The bar may be constructed of solid gold or any other suitable material, and its cross section may be elliptical, circular, etc.The bar is shaped to conform to the shape of the human aw and the endsare preferably flattened as at 2, and perforated as at 8, to form ananchorage with relation to the vulcanite in which they are embedded.

Lingual bars are provided for the purpose of forming a connectionbetween partial dentures, such as illustrated at 4: and 5. Thesedentures are usually located one on each side of the jaw and as they aresubj ected to considerable pressure in varying direc- Serial No. 5073M.

pressure and strains to which the partialplates or dentures aresubjected, a pair lateral projections, such as indicated at 6, have beenprovided. These are also flattened and perforated, as indicated, and areformed as an integral part of the bar proper. The present bar is soconstructed that the ends, together with the lateral projections, may becompletely embedded in the vulcanite or hard rubber, of which thepartial plates or dentures are formed. This is important as partialexposure of the metal parts is not desirable. The lateral projections 6permit of a maximum amount of retention, thus eliminating thepossibility of the bar working loose in the finished vulcanite partialdenture. The perforations formed in the bar are also of importance asthey further increase the retaining feature which tends to render thebar more secure in the vulcanite. The lateral projections may be bent tomeet any condition which may be present without fear of fracturing thesame; for instance where a flat or low ridged gum or mouth isencountered, as illustrated in Fig. 3, it is only necessary to partiallyflatten the projections. Again if the mouth is high ridged, asillustrated in Fig. 4:, it becomes possible to curve or round the same.While, if the mouth or gums are provided with deep lingual walls, it isobvious that the bend in the bar and in the projections may be furtherincreased.

From the foregoing it can be seen that the bar is constructed to meetthe strain that the partial plate or denture is subjected to during theside-bite, incisingbite, and open and shut-bite, which occur in theprocess of mastication. This is due to the fact that the form of thebar, the perforations there in, and the projecting extensions 6, renderit impossible for the bar to work loose in the vulcanite. The bar isfurtherfore constructed to consume as little space as pos sible, thusallowing for the maximum of vulcanite, which naturally increases thelife, strength and durability of the denture; for instance in caseswhere the lingual flange is thin it is still possible to permit the barto be sufliciently covered with vulcanite without forming a bulkydenture. Again, in cases where the lingual flange is of medium depth,the bar can be placed so that there will be sufiicientvulcanite belowthe bar to prevent exposure thus further increasing the strength of theplate. Another advantage is obtained by directing the lateral extensionscrosswise of the vulcanite denture from lingual to buckle thus againincreasing the rigidity of the denture, and strengthening the tie orbond between the bar and the denture.

While the drawings illustrate a single pro jection on each end of thebar, it is obvious that one or more may be formed if desired,

' similarly that other changes in the construction, combination andarrangement of parts may be made by those skilled in the art withoutdeparting from the spirit of the invention as claimed.

The bar may also be employed in conjunction with partial upper platesand as such would be termed a palatile bar.

Having thus described my invention, what I claim and desire to secure byLetters Patent is l. A device of the character described comprising asubstantially U-shaped bar, and a lateral outwardly extending projectionformed adjacent each end of the bar, said projections and the ends ofthe bar be ing flattened and the ends of the bar extending beyond thesaid lateral projections.

2, A device of the character described comprising a substantiallyU-shaped bar, a lateral outwardly extending projection formed adjacenteach end of the bar, said projections and the ends of the bar beingflattened, and perforations formed in the ends of the bar and saidprojections.

MARIO F. ARATA.

